private void btnHuy_Click(object sender, EventArgs e) { try { if(MaHoaDon!=0) { DialogResult dialog = MessageBox.Show("Bạn có muốn hủy bàn", "Hủy", MessageBoxButtons.YesNo); if (dialog == DialogResult.Yes) { for (int i = 0; i < dataGridViewXListMonAn.Rows.Count; i++) { int MaChiTiet = Convert.ToInt32(dataGridViewXListMonAn.Rows[i].Cells[1].Value.ToString()); int SoLuong = Convert.ToInt32(dataGridViewXListMonAn.Rows[i].Cells[4].Value.ToString()); BanHang.Model.Update update = new BanHang.Model.Update(); HoaDon.model.Load load = new HoaDon.model.Load(); DataTable dt = load.LoadChiTietHoaDonTheoMaChiTietHoaDon(MaChiTiet); int MaMonAn = Convert.ToInt32(dt.Rows[0][1].ToString()); update.TraHangTrongKho(MaMonAn, SoLuong); } ////BanHang.Model.Delete delete = new BanHang.Model.Delete(); ////delete.DeleteMonAn(MaChiTiet); BanHang.Model.Delete delete = new BanHang.Model.Delete(); delete.DeleteHoaDon(MaHoaDon); LoadChiTietHoaDon(MaHoaDon); LoadSoLuongSanPham(); loadThucDon(); ResetBanHang(); MaHoaDon = 0; } } else { MessageBox.Show("Bạn chưa chọn hóa đơn"); } } catch (Exception) { } }